Gelled propellants

Gelled Propellants. As with powdered metallic fuels in solid composite propellants, early interest in gelled liquid propellants focused on gelation as a means of incorporating high-energy solids into liquid propellants... 

Hodge, K., Crofoot, T., and Nelson, S., Gelled Propellants for Tactical Missile Applications, AIAA 99-2976, 35th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, June 1999. 

Gelling agent Poly(vinyl chloride) Thixotrophic liquid propellant... 

Uses, (see also under Perchlorate Propellants and Explosives). It is used in pyrotechnics to impart a bright red color to flames (Ref 3). A gel was made from 50g of Sr perchlorate, lOOg of me ale, and 4.6g of Carbopol 940 gelling agent. Five g of this gel burned for 10 mins with an intense red flame (Ref 11). A 66/34 mixt of Sr perchlorate/powd Al was tested as a photo-flash compn for both sea level and high altitude use (Ref 8). Another mixt of 50ml of me... 

Gel lacquer formulations used for dip coating. The early catapult propellants were inhibited by dipping in a lacquer consisting of toluene 80p, acetone 20p and a total solids content of 15-18%. The grains were dipped twice and had a cured inhibitor thickness of 20 to 30 mils. As the size of experimental slotted tube catapults increased, coatings of 100 mils were required. This necessitated an increase of the solid content to 25-27%. As this soln was too viscous some methylol was incorporated in solvent formulation. In order to improve the room temp gelling characteristics an aliphatic hydrocarbon was added... 

Gelled Liquid Nitroporaffins, such ad Nitro-methane, cofttg 5—75% NG, some amine and up to 3% of Cr acetylacetonate, may be used as an expl or a propellant, The gels are liquid if small amts of NC are used, and solid if the amts are high Refs H. Maisner, USP 2690964(1954) ... 

A second consideration concerned with propellant storage and which applies specifically to slurried propellants is its mechanical stability. The suspended particles must remain in stable suspension in the gelled liquid for long times, and the mixture must not exude liquid (syneresis). To... 

Propellants Propellants Rocket Rocket Rocket Gelled Rocket... 

A propellant which consists of nitrocellulose (NC) as the only explosive ingredient is called a single-base (SB) propellant. The formulation consists of 90% or more of NC with a nitrogen content of 12.50-13.25%. NC is gelled with the help of a... 

Thixotropic gels are also useful as propellants for rocket applications. These are commonly called thixotropes or gels. Normal fuels and oxidizers are converted into thioxotropes by the addition of a small quantity of a gelling agent in order to ensure uniform suspension of solid additives (usually metal additives) during storage. It is reported that if very finely pulverized particles of beryllium or aluminum are suspended in the liquid fuel, it is possible to increase the specific impulse substantially. 

The monomer tends to self polymerise and this may become explosive. It must be stored inhibited [1], Exposure of the pure (unstabilised) monomer to air at ambient temperature for 2 months generated an ester—oxygen interpolymer, which exploded on evaporation of the surplus monomer at 60°C (but not at 40°C) [2], Polymerisation, probably initiated by mst, in a chum of the monomer led to development of overpressure which sheared off the base and propelled the drum into the roof of the building [3]. Some oxygen must be present in the nitrogen used to inert storage tanks, to activate the stabiliser and prevent gelling of the monomer. Use of an... 

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